Muslims offer Eid al-Adha prayers next to the ruins of the Feroz Shah Kotla mosque in New Delhi October 16, 2013. Muslims around the world celebrate Eid al-Adha by the sacrificial killing of sheep, ... more&nbsp

Muslims offer Eid al-Adha prayers next to the ruins of the Feroz Shah Kotla mosque in New Delhi October 16, 2013. Muslims around the world celebrate Eid al-Adha by the sacrificial killing of sheep, goats, cows and camels to commemorate Prophet Abraham's willingness to sacrifice his son Ismail on God's command. REUTERS/Anindito Mukherjee (INDIA - Tags: RELIGION SOCIETY) less&nbsp